[llvm] InstCombine/Select: remove redundant code (NFC) (PR #112388)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> FYI this piece of code still has (small) code coverage on my dataset. See also https://dtcxzyw.github.io/llvm-opt-benchmark/coverage/data/zyw/opt/actions-runner/_work/llvm-opt-benchmark/llvm-opt-benchmark/llvm/llvm-project/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp.html#L1961.
> 
> Of course we can just drop them/make the logic simpler :)

I don't doubt that the code has coverage, but I think a later and more powerful simplification subsumes it.

https://github.com/llvm/llvm-project/pull/112388